Improvement in rotary harrows



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ROTARY HARROW.

No. 30,795. Patented Dec. 4, 1860.

MICHAEL L. BAUDER, ion CLEVELAfiDfHIQ R VEMENT lN i-" oTA'RY HA'R RlO WfS." 1 A UNITED STAT-Es 1P I Specification forming part of Letters Patient No. 30,195, dated December 4, 1860 To all whom it may concern.-

Be it known that I, MICHAEL L. BAUDER, of Cleveland, in the county of Ouyahoga and State of Ohio, have invented new and useful Improvements in Combined Rotary Harrow and Uultivator and I do hereby declare that the following is a full and complete description of the construction and operation of the same, reference being had to the accompanying drawings, making partof this specification, in which Figure 1 is a perspective view of the barrow. Fig. 2 is a side view of the same. Fig.3 is a perspective view of acultivator constructed upon the same principle as the harrow.

My invention consists of a peculiar construction and arrangement of rotary barrows provided with triangular teeth.

In the following description likeletters refer to like parts in the several figures.

The frame of the harrow or cultivator A, Figs. 1 and 3, may be square, round, or polygonal, or it may he composed of arms radiating from a common center. From the center of the harrow or cultivator there rises a bolt or pin, B, of sufficient strength to sustain the whole draft. To this center pin, B, is attached an arm or draw-bar, U, to the forward end of which is attached the draft. This pin B is round and allows a free rotary motion of the harrow. The plates H I K co-operate with the bolt B in rendering such motion free, and at the same time theystrengthen the harrow and render the joint durable.

In constructing a cultivator the only difference in the construction from that of the harrow is in the diameter, which is less than the barrow, a less number of teeth, and in the addition of handles. (Seen in Fig. 3 at 0'.) By means of these handles the cultivator can be guided between the rows of corn. Both the harrow and cultivator are caused to rotate upon the axis B by means of the peculiar form of the teeth and the position in which they are placed in the frame.-

The tooth is triangular in form, one of the faces being curved a little forward, as seen at D, Figs. 1, 2, and 3; or theface may be straight, as in Fig. 4. The other two faces of the tooth are curved toward the face D in order to bring the tooth to a point. The sharp angle E thereparallel with radial lines) the face of the tooth will incline forward from a perpendicular with the face of the harrow. Now, if each particular tooth is set in the same relative position as regards the center of the frame, the teeth upon one side from any given position will all incline "forward, as at F, Fig. 2, and upon the opposite side they will all incline backward,

as seen at G, Fig. 2.v .Even if the face of the tooth D should be caused to stand perpendicular with the plane of the harrow, the angleE of the tooth would incline either forward or backward, as in the former case. It would consequently follow that in dragging the barrow or cultivator over the ground the face D would present more resistance to the soil and take a deeper hold than the sharp angle E, and hence that side of the harrow which presented the angle E of the teeth forward, by meeting with less resistance than the opposite side, will cause the harrow to rotate slowly upon the axis B. The sharp angle of the teeth thus presented to the soil becomes the efficient instrument for pulverizing the same. By placing the teeth of the form and structure de* scribed in the position specified the harrow or cultivator will not become clogged with stubble or other herbaceous matter that may be found upon the ground.

The teeth may be fastened into the frame of the harrow by means of a screw-thread and nut upon the upper end ofvthe shank, or by any other convenient means.

In constructing this harrow I contemplateusing a single frame, as described, or two distinct ones of half the usual diameter, and placed side by side and properly secured to= gether by means of abar passing between them. In this case I propose to place the teeth in one in the reverse position to those in the other, so that in their use the two will revolve in opposite directions, though it is not necessary that this should be the case.

The cultivator herein described differs in no way from a simple harrow, except in its size and in the number of the teeth and the appendage of handles, as specified. The principle of action is the same in both.

The form of the teeth may be somewhat varied without departing from my invention, so long as they present sharp edges forward with broad bases behind.

I am aware that triangular fixed and inclined teeth are not new in rotary harrows'; but I believe it is new to make a barrow rotate .by means of fixed triangular teeth, in connecsimilar efi'ectandco-operating with the action of l the teeth. Therefore Ido not claim the shape, position, or inclination of the teeth, or any of the devices separately considered; but

What I do claim, and desire to secure by Letters Patent of the United States, is

The triangular teeth 1) E, frame A, draftbeam 0, axle B, and plates H K, when the whole is constructed and arranged for operation conjointly, as and for the purpose herein set forth.

M. L. BAUDER. Witnesses:

J. BRAINERD, W. H. BURRIDGE. 

